Drilling-machine



(No Model.) 2 Sheets-Sheet 1.

G. W. MIDGLEY & H. E. 'HARBAUGH.

DRILLING MAGHINB.

Patented July 8 (No Model.) 7 2 Sheets-Sheet 2.

, G. W. MIDGLEY 8: H. E. HARBAUGH. DRILLING MACHINE.

N0. 431',606. Patented July 8, 1890.

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To all whom it may concern.-

UNITED STATES PATENT OFFICE.

GEORGE IV. MIDGLEY AND HOWARD, E. HARBAUGH, OF ROCKFORD, ILLINOIS.

DRlLLING -MACHINE.

SPECIFICATION forming part of Letters Patent No. 431,606, dated July 8,1890.

Application filed April 18, 1890. Serial No. 348,557. (No model.) I

Beit known that we, GEORGE W. MIDGLEY and HOWARD E. HARBAUGH, citizensof the United States, residing at Rockford, in the county of Winnebagoand State of Illinois, have invented certain new and useful Improvementsin Drilling-Machines, of which the following is a specification.

The objects of our invention are, first, to provide both pinions andfriction-wheels that may be used alternately for driving thedrillspindle, according as power or speed may be the main thingrequired; second, to afford means for preventing the drill-spindle fromsliding down too suddenly in its bearings;-

third, to introduce the screw-rod for operating the platen-bracketwithin the column of the drill-frame, and, fourth, to provide means forconnecting the platen-bracket with its adjusting screw-rod.

This invention consists of certain new and useful features ofconstruction and combinations of parts hereinafter described, andspecifically pointed out in the claims.

Referring to the accompanying drawings, which form a part of thisspecification, Figures 1 and 2 are respectively right and left sideelevations of the drilling-machine embodying our improvements, a smallportion thereof being in central Vertical section in Fig. 2. Fig. 3 is ahorizontal section at dotted line X X of Figs. 1 and 4. Fig. 4 isavertical sect-ion at dotted line X Xof Fig. 3. Fig. 5 is a centralvertical longitudinal section of the pinions and friction-wheels thatdrive the drill-spindle and the parts operating, supporting, andco-operating with the same. Fig. .6 is a like view of the same inpartial section. Fig. 7 is a longitudinal section, at the dotted line XX of Fig. 1, of the drill-spindle feed-lever. Sis a top View of aspring-catch for retaining the feed-lever in position when not in use.

Like letters of reference indicate corresponding parts throughout theseveral views.

A is the base'of the drill-frame. A is a vertical tubular column rigidlyconnected therewith.

A A A are trifurcations integral with the column A, provided withbearings A A the column A.

A A at their free ends for supporting parts to be described hereinafter.

A is a vertical groove in the column A, extending from the base A to thebead A (indicated by the dotted line Y in Fig. 1.)

Bis a platen-bracket having a vertical tubular opening 13 extendingtherethrough to admit the column A,whereon it may be vertically slid andhorizontally revolved for adjustment. The tubular portion of the bracketB is cleft vertically at B and provided with ears B''B and a screw B forsecuring the same at any desired point on the column A.

B is a horizontal annular groove in the tubular portion of theplaten-bracket B, open on the inside-that is, the side adjacent to B isa platen both connected with the platen-bracket and operated in theusual manner.

B is a bar-screw for clamping the platen B rigidly in the socket B C 'isa horizontal miter-pinion having a central circular vertical threadedopening extending therethrongh and being mounted on the bearing 0.

C is a vertical platen-adjusting screw-rod for regulating the height ofthe platen-bracket 13, included in the groove A in the column A and theupper portion of the drill-frame, the threaded portion thereof beinginserted through and operating in the pinion C.

C is a segment of a ring of suitable diameter to coincide with and slideon the column A of the drill-frame, included in the annular groove B inthe platen-bracket B, provided with a lug G which projects into thegroove A in the column A and connects with the lower end of theplaten-adjusting screwintegral rack D in the vertical bearing A so as tofreely slide therein, and having avertical and preferably projectingfrom the back side thereof.

D is a horizontal shaft mounted in a bearin g in the part A I) is apinion fast to the central portion of the shaft D and meshing with therack D.

l) is a hand-wheel rigidly connected with the shaft D D is aratchet-wheel fast to one end of the shaft D D is.a tubular feed-levermounted and rotatable on the shaft D D is a pallet that may engage withor be disengaged from the ratchet-wheel D.

D is an actuating spring for holding the pallet D into engagement withthe ratchetwheel D D is a ring connected with and for disengaging thepallet D from the ratchet-wheel D, as indicated by dotted lines.

, E, Fig. 5, is a bushing driven snugly into the bearing A The partsE Amay be integral, if desired.

E E area miter-pinion and sleeve-shaft, integral or rigidly connectedtogether, the latter inserted through and mounted in the bushing E.

E is a miter friction-Wheel, the periphery E thereof being mitered, asshown, mounted concentrically with the miter-pinion E by being rigidlyconnected therewith, as shown. The mitered periphery E of the wheel Eshould be composed of or covered with leather or other suitable elasticmaterial E capable of affording the amount of friction necessary .tocause the same to readily engage with its counterpart friction-wheel.

E is a friction-tube of the same interior diameter as the sleeve-shaft Eintegral or rigidly connected with the miter-pinion-E and saidsleeve-shaft E E is a valve for closing the upper end of thefriction-tube E when desired.

, E is a drill-spindle mounted in the sleeve bearing D and having theupper end E thereof extending well into the friction-tube E, for apurpose to be described hereinafter.

E is a friction-ring of leather or other elastic material inclosing theupper end of the drill-spindle to produce friction between the latterand the friction-tube E E is a longitudinal spline-groove in the upperportion E of the drill-spindle E E is a spline rigidly connected withthe sleeve E and adapted to slide in the groove E in the part E.

F is asleeve inserted through and mounted in the bearing A F is a splinerigidly connected with the sleeve F. The sleeve F is provided with anexterior right-hand screw F F is a shaft provided with an exteriorlefthand screw F and mounted in the bearing and sleeve A F, wherein itmay be reciprocated endwise by means of a part to be describedhereinafter.

F is a longitudinal spline-groove wherein the spline F may slide in theshaft F F is a miter-pinion rigidly connected with the shaft F andadapted to mesh-with and unmesh from the miter-pinion E.

F is a miter friction-wheel, the periphery thereof being mitered, asshown, rigidly connected with the sleeve-F, and adapted to engage withand be disengaged from the friction-wheel E F is a nut provided withinterior right and left hand screws F and F respectively.

G, Figs. 1 and 8, is a horizontal stud projectin g from the portion A ofthe drill-frame.

G is a tubular catch adapted to slide on the stud G.

G is a spring for actuating the catch G. The ofiice of the catch G is toretain the feedlever D in the position shown in Fig. 1 when the same isnot in use.

H H H are c0ne-pulleysfast andv loose pulleys, respectively.

H is a belt-shipper. V

The platen-bracket B and platen B being supported by a screw-rod O andring-segment 0 in the manner already described, may be raised andlowered to any desired point between the parts A A by means of the crankC and revolved about the columnar portion A of the drill-frame.

The combined function of the friction-tube E the ring E and the producedportion E of the drill-spindle E is to insure the latter by producingfrictional contact between itself and the friction-tube E againstdescending too suddenly. ready indicated, or in any equivalent manner,will cause the drill-spindle to slide down easily whenever it descends,thereby preventing injury to drills, to work on the platen, and to theoperator from drills on the free end of the feed-lever D whichfrequently becomes disengaged from its catch and descends with dangerousforce.

The valve E may be used as an auxiliary of the friction-tube E ordispensed with, according as desired.

The drill-spindle E may be raised and lowered by means of the hand-wheelD and the feed-lever D, precisely the same as in otherdrilling-machines.

Fig. 5 shows the friction-wheels E F in engagement. \Nhenever it isdesired to substitute gear for friction-connection, turn the nut F tothe position shown in Fig. 6. The

friction-wheel F will thereby recede from and the pinion F advance to.positions there shown, thereby meshing the pinion F with the pinion E Areverse motion of the nut F 'will obviously restore the parts to whichreference has just been made to the positions shown in Fig. 5.

We claim- 1. In combination, in a drilling-machine, the

The friction produced, as 3.1-

LII

platen-bracket, the ring-segment whereby the same is supported andwhereon it may be revolved, the platen operatively connected with theplaten-bracket, and the screw-rod connected with the ring-segment,substantially as and for the purpose specified.

2. In combination, in a drilling-machine, the drill-frame having avertical groove in the columnar portion thereof, the platen-bracketconnected therewith, the ring-segment whereby the platen-bracket issupported and whereon it is revoluble, and the screw-rod connected withthe platen-bracket by means of the ring-segment and included in thevertical groove in the drill-frame, substantially as and for the purposespecified.

3. In combination, in a drilling-machine, the f Fiction-tube, thedrill-spindle adapted to slide therein, and the friction-ring or otherequivalent means of producing friction between said friction-tube anddrill-spindle for causing said drill-spindle to slide down slowly insaid friction-tube, substantially as and for the purpose specified.

4. In combination, in a drilling-machine, the miter-pinion andsleeve-shaft mounted in a suitable bearing, the friction-tube integralor rigidly connected with the miter-pinion, and the produceddrill=spindle provided witha frictiOn-ring and inserted through thesleeve,

pinion, and friction-tube, and having a groove and spline or cognateconnection with the parts through which it passes and in which itoperates, substantially as and for the purpose specified.

5. In combination, in a drilling-machine, a pair of mounted pinions andapair of frictionwheels mounted concentrically therewith, each pairbeing arranged to engage as the other pair disengages, substantially asand for the purpose specified.

6. In combination, in a drilling-machine, a pair of friction-Wheelsarranged to engage and be disengaged, a pair of pinions arranged to meshand unmesh and having concentricity with a pair of friction-wheels, andsuitable shafts and bearings for operatively connecting saidfriction-wheels and pinions, substantially as and for the purposespecified.

GEORGE W. MIDGLEY. HOWVARD E. HARBAUGH. Witnesses:

L. L. MORRISON, E. F. DOWLING.

